Combined hot-water and hot-air furnace.



No. 745,130. i PATENTED NOV. 24, 1903. I

J. ZIEOLBR. COMBINED HOT WATER AND HOT AIR FORNAOE.

APPLIUATION FILED MAY 26.1903.

No.l 745,1 so.

Patented November 24,1 903.

PATENT OFFICE.

JACOB ZIEGLER, OF ERIE, PENNSYLVANIA.

COMBINED HOT-WATER AND HOT-AIR F-URNACE.

SPECIFICATION forming part of Letters Patent No. 745,130, dated November 24, 1903. Application nea May 26.1903. serial 116.158.377. (Nomina.)

To @ZZ whom t may concern.'

Be it known that I, JACOB ZIEGLER, a citi- -zen of the United States, residing at Erie,'in i the county of Erie and State of Pennsylvania.,

' part of this specification.

My invention relates to combined hot-water and hot-air heating-furnaces, and has for its object the construction of a furnace for heat` ing houses in which there is a small boiler Acombined `therewith in such a manner that water is heated therein for circulation through an ordinary hot-water heating system, and at the same time air is heated by the furnace to be supplied to registers for heating rooms in the usual manner.

The features of my invention are hereinafter set forth and described, and illustrated in the accompanying drawings, in which- Figure 1 is a vertical section of my improved furnace on the line w win Fig. 2. Fig. 2 is a transverse vertical section on the line X X in Fig. l.

In the drawings illustrating my invention,

A is the ash-box; a, the ash-box door; B, the.

grates; D, the lire-box, and d the fire-box door. Above the fire-box there is mounted a horizontal boiler consisting of an outer shell E and an inner shell E', which inner shell'E operates as a due, and extending outwardly from the shell E there are hollow projections e, and extending inwardly from the shell E there are hollow projections e. Resting upon between the casing F and the outside shell E of the boiler as a flue through which the products of combustion pass, over the top of the boiler to the rear end thereof. At the front end of the boiler the inner shell E thereof is provided with an extension E2, the outer end l of which is closed by a hand-hole plate E3, and in the upper side of this extension there is an opening e2, to which a flue H is connected which passes up and over the top of the casing F to a point beyond the rear ofthe boiler, where it is provided with an exit-flue H' and a hand-hole h. It will be observed that in this construction the heat and products of combustion arise from the fire-box and pass up inside of the casing F,'around the outside shell E of the boiler, and through the line F to the rear end of the boiler, and thence forward, through the flue formed by the inside shell E of the boiler and the extension E2 thereof, to the due H, and thence up and back therethrough over the top of the casin'g F to the outlet-flue H. Between the top of the rear of the fire-box D and the rear end of the outside shell E of the boiler I place a transverse damper I, provided with a handle I for turning it, so that for a quick fire the damper I can be turned and the products of combustion can pass directly from the fire-box D up past the damper I and directly into the cen'- tral due of the boiler and thence out, as hereinbefore described.

'Around the entire structure hereinbefore described I place a casing J, with one or more air-inlet openings J at the bottom thereof.

This casing J extends up and around the furnace structure soas to inclose the same in the usual manner, and in the top thereof it is provided with openings for hot-air-conducting pipes M M, as may be desired, and the air passing up between this casing J and the outside walls of the dre-box D and up around the outside of the casing F, and between and around the projections f thereon, and in contact with the iiue H over the top of the casing F operates to heat it, and it finally passes out through thedistributingpipes M M, so that the waste heat of the water-heater is utilized to heat air, and, vice versa, the waste heat of the usual hot-air furnace is used for heating water, and in this manner Loan utilize the heat so as to heat some rooms with hot air and others with hot water, and thereby do the same at a minimum expense for fuel.

I have thus shown and described my invention so as to enable others to construct and use the same, and

YVhat I claim as new, and desire to secure by Letters Patent of the United States, is-

l. The combination in aheating-furnace, of a boiler over the fire-box having a large Iiue through its center, a system of fines for conducting the products of combustion around the boiler and through a flue to the rear of the boiler and back through the flue in the center of the boiler and thence to the exit-flue, a casing around the boiler having hollow projections extending outwardly therefrom, and an outside casing surrounding the structure having an air-inlet opening in the bottom thereof and air-outlet openings at the top thereof substantially as set forth.

2. The combination in a heating-furnace, of a fire-box, a horizontal boiler over the fireboX, a Iiue through the center of the boiler,

hollow projections extending outwardly from the outer shelland inwardly from the inner' shell of the boiler, a casing extending from the top of the iire-box up around the boiler, hollow projections extending outwardly therefrom, radial walls between the outer wall of the boiler and said casing whereby a flue is formed by the outer wall of the boiler, the casing and said radial walls extending from the rear of the boiler toward 

